Just returned from a week near Minsmere, got my first sightings of Cetti's Warbler, Dartford Warbler, Black Tern, Woodlark, Garden Warbler, Marsh Tit, Turtle Dove and, although not a wild bird, the Greater Flamingo.
Also got to see Hummingbird Hawk-moth, Green Hairstreak, Slow Worm, Stoat, Muntjac and Red Deer in the wild for the first time too... although those are somewhat outside the topic of this thread! :-O
Northern Saw-whet Owl
The sparrow is a controversial bird; no doubt on the id, but how it got to Colorado is a mystery. This would be a first ABA record if accepted, which is a pretty big if. At any rate, at least for now, the odd location (middle of nowhere in a small mountain community) and absence of any clear indication of captive origin (feather wear, leg band, etc) is causing me to tentatively add this bird to my life list.